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1 package com.genimen.djeneric.tools.generator.core.nodes;
2
3 import com.genimen.djeneric.tools.generator.core.DjentelParserEngine;
4 import com.genimen.djeneric.tools.generator.core.ParseException;
5 import com.genimen.djeneric.tools.generator.core.SimpleNode;
6 import com.genimen.djeneric.tools.generator.core.util.ParseContext;
7
8 public class AndOrNode extends SimpleNode implements BooleanExpression, ValueExpression
9 {
10
11 public AndOrNode(int i)
12 {
13 super(i);
14 }
15
16 public AndOrNode(DjentelParserEngine p, int i)
17 {
18 super(p, i);
19 }
20
21 public String  getName()
22 {
23 return toString();
24 }
25
26 public String toString()
27 {
28 return getOperator();
29 }
30
31 public void setOperator(String operator)
32 {
33 this.operator = operator;
34 }
35
36 public String getOperator()
37 {
38 return operator;
39 }
40
41 private String operator;
42
43 public Object getValue(ParseContext context) throws ParseException
44 {
45 return new Boolean (evaluate(context));
46 }
47
48 public boolean isTrue(ParseContext context) throws ParseException
49 {
50 if (!(getChild(0) instanceof BooleanExpression))
51 {
52 throw new ParseException("Expression is not boolean", getChild(0).beginLine, getChild(0).beginColumn);
53 }
54 if (!(getChild(1) instanceof BooleanExpression))
55 {
56 throw new ParseException("Expression is not boolean", getChild(1).beginLine, getChild(1).beginColumn);
57 }
58
59 BooleanExpression left = (BooleanExpression) getChild(0);
60 BooleanExpression right = (BooleanExpression) getChild(1);
61
62 if (getOperator().equals("&&"))
63 {
64 return left.isTrue(context) && right.isTrue(context);
65 }
66 else if (getOperator().equals("||"))
67 {
68 return left.isTrue(context) || right.isTrue(context);
69 }
70 throw new ParseException("Unsupported operator: " + getOperator(), beginLine, beginColumn);
71 }
72
73 }
74 |
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